2780505506 has 12 divisors (see below), whose sum is σ = 4309641846. Its totient is φ = 1345404960.

The previous prime is 2780505503. The next prime is 2780505509. The reversal of 2780505506 is 6055050872.

2780505506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2780505503) and next prime (2780505509).

It can be written as a sum of positive squares in only one way, i.e., 2581554481 + 198951025 = 50809^2 + 14105^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2780505506.

It is not an unprimeable number, because it can be changed into a prime (2780505503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 721415 + ... + 725258.

Almost surely, 2^2780505506 is an apocalyptic number.

2780505506 is a deficient number, since it is larger than the sum of its proper divisors (1529136340).

2780505506 is a wasteful number, since it uses less digits than its factorization.

2780505506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446737 (or 1446706 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 2780505506 is about 52730.4988218393. The cubic root of 2780505506 is about 1406.1810893218.

The spelling of 2780505506 in words is "two billion, seven hundred eighty million, five hundred five thousand, five hundred six".